One thousand kmol/h of 30 mol% n-hexane and 70% n-octane is distilled in a column consisting of a partial reboiler, one equilibrium plate, and a partial condenser, all operating at 1 atm. The feed, a bubble-point liquid, is fed to the reboiler, from which a liquid bottoms is withdrawn. Bubble-point reflux from the partial condenser is returned to the plate. The vapor distillate contains 80 mol% hexane, and the reflux ratio, L/D, is 2. Assume the partial reboiler,plate, and partial condenser are equilibrium stages. (a) Using the McCabe–Thiele method, calculate the bottoms composition andkmol/h of distillate produced. (b) If a is assumed to be 5calculate the bottoms composition analytically.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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One thousand kmol/h of 30 mol% n-hexane and 70% n-octane is distilled in a column consisting of a partial reboiler, one equilibrium plate, and a partial condenser, all operating at 1 atm. The feed, a bubble-point liquid, is fed to the reboiler, from which a liquid bottoms is withdrawn. Bubble-point reflux from the partial condenser is returned to the plate. The vapor distillate contains 80 mol% hexane, and the reflux ratio, L/D, is 2. Assume the partial reboiler,plate, and partial condenser are equilibrium stages. (a) Using the McCabe–Thiele method, calculate the bottoms composition and
kmol/h of distillate produced. (b) If a is assumed to be 5calculate the bottoms composition analytically.

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